How to Fill Out a W-9 for a Nonprofit

A W-9 provides your taxpayer identification number to someone who is going to pay you, so they can report the payment correctly. Being tax exempt does not exempt you from providing one.

That is worth stating plainly, because the belief that it does is common and it costs organizations money. A payer who cannot obtain a valid W-9 may be required to apply backup withholding, deducting a percentage of your payment and sending it to the IRS.

When a nonprofit is asked for one

The distinction that confuses people: a donation is not a payment for services and does not generate information reporting. A grant, a fee, or a sponsorship payment may. Payers request the W-9 as a matter of routine either way, and providing it costs you nothing.

Filling it in, line by line

Line 3, which is where it goes wrong

The classification boxes on line 3 are individual or sole proprietor, C corporation, S corporation, partnership, trust or estate, LLC, and Other.

A nonprofit corporation is not a C corporation for this purpose, even though it is a corporation. Ticking that box misstates your status.

Tick Other and write your status on the line beside it. “Nonprofit corporation exempt under 501(c)(3)” is clear and standard. If you are exempt under a different subsection, say which.

Organizations structured as trusts should tick trust or estate and note the exempt status. Unincorporated associations should tick Other and describe themselves accurately.

Line 4, the box that is not for you

Line 4 has two codes: an exempt payee code, and an exemption from FATCA reporting code.

The exempt payee code refers to exemption from backup withholding, which is a different thing from charitable tax exemption. Certain organizations, including tax-exempt organizations under section 501(a), do fall within the exempt payee categories, and the codes are listed in the instructions to the form.

Most nonprofits leave line 4 blank without consequence, since a properly completed and certified W-9 with a valid TIN prevents backup withholding anyway. If a payer specifically asks you to complete it, read the instructions on the form itself rather than guessing, because the codes are numbered and using the wrong one is worse than leaving it empty.

The FATCA box applies to accounts maintained outside the United States and is not relevant to most domestic organizations.

The employer identification number

Use the organization’s EIN, always. Never an individual’s Social Security number, even if the organization is small, even if the founder set everything up personally.

An EIN is free and is obtained on Form SS-4, in most cases online with the number issued immediately. If your organization does not have one, get it before doing anything else, because you also need it for a bank account.

Check the number against your determination letter before sending. A transposed digit produces a mismatch notice to the payer months later and can trigger backup withholding on payments already made.

The forms this one is confused with

The most common mix-up is between a W-9 and the determination letter. A funder asking for proof that you are a 501(c)(3) wants the determination letter. A funder setting you up in their payment system wants the W-9. Several will ask for both, and it is worth keeping current copies of each somewhere you can reach in a minute.

Note also that the W-9 is never filed with the IRS. You give it to the payer, who keeps it and uses it to prepare information returns. That is why the form asks for a certification rather than being submitted anywhere.

Backup withholding, and what it actually costs

This is why the form matters rather than being an administrative nicety.

Where a payer cannot obtain a valid taxpayer identification number, or the IRS notifies them that the one provided does not match its records, they may be required to apply backup withholding. A percentage of the payment is deducted and sent to the IRS rather than to you.

The money is not lost, and it is not available either. Recovering it means claiming it against your own filing, which for a tax-exempt organization with no income tax liability is an unnecessary exercise in getting your own money back months later.

The third row causes most real cases. Organizations frequently trade under a shortened or friendlier name and put that on line 1. The IRS matches on the legal name associated with the EIN, so the trading name belongs on line 2 and the legal name on line 1. Getting those two lines the wrong way round is the single most common cause of a mismatch notice.

Collecting them, which is the other half

Your organization is also a payer, and the discipline that saves work in January is collecting a W-9 from every contractor before you pay them, not after.

Chasing a W-9 from someone you have already paid, in January, when they have moved on, is a recognisable annual misery. Make it a condition of the first payment and the problem disappears.

Store them securely. They contain taxpayer identification numbers, and for individual contractors that is a Social Security number, which is exactly the sort of data that should not sit in a shared drive everyone can open.

Signing and sending it safely

An officer authorised to bind the organization signs. Confirm your bylaws or a board resolution actually give that authority to whoever is signing.

Then handle it as the sensitive document it is. A W-9 carries your EIN, and while a nonprofit’s EIN is far less sensitive than an individual’s Social Security number, it is still not something to email casually or post publicly.

Send it to a specific person at the payer, ideally through their own secure portal where they have one. Do not publish a completed W-9 on your website. And keep a current signed copy on file so you are not recreating it under time pressure each time a funder asks.

Update it whenever your legal name, address or EIN changes, and send the revised version to anyone who pays you regularly.

Questions people ask

Does a nonprofit need to fill out a W-9?

Yes, whenever a payer requests one. Tax exemption is exemption from income tax on your exempt activities. It is not an exemption from the information reporting system.

Grantors, corporate sponsors, government bodies and anyone paying you for services will routinely ask. Providing it costs nothing.

Refusing has a cost. A payer who cannot obtain a valid W-9 may be required to apply backup withholding, deducting a percentage of your payment and remitting it to the IRS. Recovering it means claiming it back later rather than receiving the money now.

What tax classification does a nonprofit select on a W-9?

Tick Other on line 3 and write your status on the line beside it. "Nonprofit corporation exempt under 501(c)(3)" is clear and standard.

Do not tick C corporation. A nonprofit corporation is a corporation, and it is not a C corporation for this purpose, so ticking that box misstates your status.

Organizations structured as charitable trusts should tick trust or estate and note the exempt status. Unincorporated associations tick Other and describe themselves accurately.

What is the exempt payee code for a nonprofit?

The exempt payee code on line 4 concerns exemption from backup withholding, which is a different thing from charitable tax exemption, and the two get confused constantly.

Tax-exempt organizations under section 501(a) do fall within the exempt payee categories, and the numbered codes are listed in the instructions printed on the form itself.

Most nonprofits leave line 4 blank with no consequence, because a properly completed and certified W-9 with a valid TIN prevents backup withholding anyway.

If a payer specifically asks you to complete it, read the codes on the form rather than guessing. An incorrect code is worse than an empty box.

What number do we put on a nonprofit W-9?

Your organization's employer identification number, in the EIN boxes in Part I.

Never an individual's Social Security number, regardless of how small the organization is or who set it up. The W-9 identifies the entity being paid, and the entity is the organization.

If you do not have an EIN, apply on Form SS-4. It is free and in most cases issued immediately online. You need it for a bank account anyway.

Check the digits against your IRS determination letter before sending. A transposed digit produces a mismatch notice to the payer months later and can trigger backup withholding on payments already made.

Who signs the W-9 for a nonprofit?

An officer authorised to sign on behalf of the organization. In practice this is usually the executive director, the treasurer or the board chair.

Check that your bylaws or a board resolution actually confer that authority. Many organizations have never looked, and discover during an audit that the person routinely signing had no formal authority to.

Print the name and title as well as signing, and date it. An unsigned W-9 is not valid and payers will return it, which delays your payment.

Do donors need a W-9 from us?

No. A charitable donation is a gift, not a payment for services, and it does not generate an information return.

What a donor may reasonably ask for is proof of your exempt status, which is your IRS determination letter, and a written acknowledgement of the gift, which is required for any single donation of $250 or more.

Corporate donors sometimes request a W-9 as a matter of internal process for setting you up in their payment system. Provide it. There is no harm in doing so and arguing about it delays your money.

Do we send a 1099 to another nonprofit?

Usually no, and the reason is that payments to corporations are generally exempt from 1099-NEC reporting, and most nonprofits are incorporated.

That exemption is about corporate status rather than tax exemption. An unincorporated nonprofit, or a payment falling into one of the categories where corporations are not exempt, may still require a return.

The safe procedure is straightforward: collect a W-9 from every payee before you pay them, then decide reporting from what the form tells you. That way the information is on file when January arrives.

Grants to another organization for charitable purposes are generally not reportable on 1099-NEC, which reports payments for services.

How long is a W-9 valid?

There is no expiry date. A W-9 remains valid until the information on it changes.

Update it when your legal name changes, when your EIN changes, or when your address changes, and send the revised version to anyone who pays you regularly.

Payers frequently request a fresh one annually as a matter of internal policy. That is their process rather than an IRS requirement, and it costs nothing to comply.

Keep a current signed copy on file so you are not recreating it under time pressure every time a funder asks. Store it securely rather than in a shared folder anyone can open.

This is reference information, not legal or tax advice. Rules vary by state and change over time. For a decision that carries real consequences, check the current text at irs.gov or your state registry, and talk to a nonprofit attorney or CPA.